Mattress cover



FIG. 1 is a top view of a mattress cover showing my new design;

FIG. 2 is a bottom view of the mattress cover thereof;

FIG. 3 is a front end view of the mattress cover, the right end view being identical thereto;

FIG. 4 is a left side view of the mattress cover, the right side view being identical thereto;

FIG. 5 is a perspective view of the mattress cover shown in use; and,

FIG. 6 is an enlarged view of a portion of the mattress cover shown in FIG. 3.

The broken lines shown in the drawings are included for the purpose of illustrating environmental subject matter and form no part of the claimed design. 

CLAIM The ornamental design for a mattress cover, as shown and described. 